The reality is that the format SMC has not changed, only the setting in your computer has changed.

Here is how it happens. If you do a search in the regular search bar at the upper right of any page and then select one of the SMC links suggested by google your format will change to the mobile version on a windows based computer.
sideways 1.JPG

How to get back to normal viewing:

1. Use the back arrow on your browser to get back to a page before you did the search.

OR

2. Scroll to the bottom of the page and select "Full Site"
sideways 2.JPG